在条目中搜索特定字符

Question

我希望无形的标签显示为绿色应该“@”符号，但它不这样做，只是什么也不做。我希望这个能继续到下一个函数，一些我能自己做的事情。如果“@”符号不在字符串中，标签就会出现，但如果@符号实际在字符串中，标签就不接受它

from tkinter import *

class Traveller:
    def __init__(self, parent):
        self.E_email = "sd"
        self.go = Frame(parent, width=500, height=450, bg="snow", pady=30, padx=10)
        self.go.grid(row=1, column=0)
        self.go.grid_propagate(0)  # to reserve space required for frame

        email = Label(self.go, text="Email:", bg="snow")
        email.grid(row=3, column=0, sticky=E)
        self.E_email = Entry(self.go, width=40)
        self.E_email.grid(row=3, column=1, sticky=W, pady=4)

        menuButton = Button(self.go, text="Continue", command=self.dataCheck)
        menuButton.grid(row=8, column=1, pady=8)

        self.meme = Label(self.go, text = "", bg = "snow")
        self.meme.grid(row=9, column=0, columnspan = 3)

    def dataCheck(self):
        self.E_email = str(self.E_email)
        if "@" in self.E_email:
            self.meme.configure(text="memem", bg = "olive drab")           

# main routine
if __name__ == "__main__":
    root = Tk()
    root.title("Traveller Details")
    play = Traveller(root)
    root.geometry("500x450+0+0")
    root.mainloop()

Answer 1

您必须使用self.E_mail.get()来获取entry小部件内部的文本

if "@" in self.E_mail.get():
     ...